Door catches
US4099757A · kind A · utility
6Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1977 |
| Grant date | Jul 11, 1978 |
| Priority date | — |
| Expiry date | Mar 28, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/57
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention concerns a child-proof door catch device which requires a sequence of unconnected manipulations to operate the mechanism opening a door. The mechanism includes a housing and operating and latching elements, the operating and latching elements being normally held apart by a biasing means. When the correct sequence of manipulations is performed on the operating element, the latching element is caused to disengage from a striker plate to allow the door to be opened.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.